/*
 * MIT License
 *
 * Copyright (c) 2020 wen.gu <454727014@qq.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

 /***************************************************************************
  * Name: mp_shared_library_msvc.cpp
  *
  * Purpose: shared library load class(for windows) implementation for micro player
  *
  * Developer:
  *   wen.gu , 2018-09-03
  *
  * TODO:
  *
  ***************************************************************************/
#if defined(_MSC_VER)

/******************************************************************************
**    INCLUDES
******************************************************************************/

#include <windows.h>

#include "mp_shared_library.h"

/******************************************************************************
**    MACROS
******************************************************************************/

/******************************************************************************
**    VARIABLE DEFINITIONS
******************************************************************************/



/******************************************************************************
**    FUNCTION DEFINITIONS
******************************************************************************/





void* MPSLOpen(const char* str)
{
    void* dllHd = nullptr;
#ifdef UNICODE
    GSZT len = strlen((const char*)str);
    size_t mallocSize = (size_t)(len * (sizeof(wchar_t)) + (sizeof(wchar_t)));
    wchar_t *wdmname = (wchar_t *)malloc(mallocSize);

    if (!wdmname)
    {
        return nullptr;
    }
    memset(wdmname, 0, mallocSize);

    if (mbstowcs(wdmname, (const char*)str, (size_t)len) == -1)
    {
        free(wdmname);
        return nullptr;
    }

    dllHd = LoadLibrary((LPWSTR)wdmname);
    free(wdmname);
#else
    dllHd = LoadLibrary((LPCSTR)str);
#endif
    return dllHd;
}

void  MPSLClose(void* slHdl)
{
    FreeLibrary((HMODULE)slHdl);
}

void* MPSLSym(void* slHdl, const char* sym)
{
    return GetProcAddress((HMODULE)slHdl, (LPCSTR)sym);
}

const char* MPSLError()
{
    DWORD ErrorCode = GetLastError();
    HLOCAL LocalAddress = NULL;
    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,
        NULL, ErrorCode, 0, (PTSTR)&LocalAddress, 0, NULL);
    return (LPSTR)LocalAddress;
}

#endif